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Fire Safety in Offices: What Every Employer and Responsible Person Needs to Know

Offices can seem like low-risk environments. No industrial machinery, no flammable liquids, no complex manufacturing processes. Just desks, computers, and people getting on with their work.

This perception is one of the most dangerous assumptions in fire safety.

Offices across the UK are subject to the same legal requirements as any other non-domestic premises — and the consequences of getting it wrong are just as severe. Electrical faults, overloaded systems, poor housekeeping, inadequate escape routes, and the rapid rise of hybrid working have all combined to make office fire safety a more complex and pressing issue than many employers realise.

This article sets out everything a responsible person needs to know — from the legal framework and common ignition sources, to fire risk assessments, evacuation planning, and the specific challenges posed by modern office environments.

The Legal Framework: What the Law Requires

In England and Wales, fire safety in offices is governed primarily by the Regulatory Reform (Fire Safety) Order 2005 (the FSO). Under this legislation, the Responsible Person — typically the employer, building owner, or managing agent — has a legal duty to:

• Carry out a suitable and sufficient fire risk assessment of the premises
• Implement and maintain appropriate fire safety measures
• Ensure that staff are informed and trained in fire safety procedures
• Prepare and maintain a fire emergency plan
• Review the fire risk assessment regularly, and whenever significant changes occur

Where five or more people are employed, the fire risk assessment must be recorded in writing.

Since October 2023, this recording requirement has been extended further: all Responsible Persons, regardless of the number of employees, must now record their fire risk assessment in writing and ensure it is available for inspection.

Failure to comply is a criminal offence. Penalties include unlimited fines and, in the most serious cases, imprisonment of up to two years.

For office occupiers who lease their premises, it is important to understand that the legal duty may be shared between the tenant (as employer) and the landlord or managing agent (as the person responsible for common parts and shared systems). Both parties need to be clear on their respective obligations — and both can be prosecuted for failures within their area of responsibility.

Common Causes of Office Fires

Understanding how fires start in offices is the first step in preventing them. The most frequent causes include:

1. Electrical Faults and Overloaded Systems

Electrical faults are the single most common cause of office fires. Modern offices place enormous demand on electrical infrastructure — computers, monitors, docking stations, phone chargers, desk fans, coffee machines, and supplementary heaters all drawing power simultaneously, often through extension leads and multi-way adaptors that were never designed for sustained heavy use.

Overloaded sockets, daisy-chained extension leads, damaged cables, and poorly maintained electrical equipment all create ignition risks. The risk is compounded in older office buildings where the electrical installation was designed for far lighter loads than today's technology demands.

Regular Electrical Installation Condition Reports (EICRs) and Portable Appliance Testing (PAT) are essential tools for managing this risk.

2. Kitchen and Catering Areas

The office kitchen is consistently one of the highest-risk areas in any workplace. Unattended toasters, microwaves with food residue, overloaded counter sockets, and cooking equipment left switched on are all common ignition sources.

Grease accumulation in extraction canopies and filters — even in simple office kitchens — creates a fire load that is easily overlooked and can burn with considerable intensity.

3. Paper, Cardboard, and Combustible Storage

Offices generate significant quantities of paper waste, cardboard packaging, and stored documents. These materials are highly combustible and, when accumulated in store rooms, under desks, or in print areas, create a substantial fire load.

Good housekeeping — regular waste removal, controlled storage, and clear desk policies — is a simple and effective fire prevention measure that is frequently underestimated.

4. Heating Equipment

Portable and supplementary heaters are a significant fire risk in offices. Heaters placed too close to paper, curtains, or furniture, left running unattended, or used with damaged cables have caused numerous office fires across the UK.

Many office fire risk assessments specifically flag portable heaters as a concern, and some organisations prohibit their use entirely outside of controlled circumstances.

5. Arson

Deliberate fire-setting is a risk that should not be overlooked, particularly in ground-floor or street-facing offices, buildings with communal entrances, and premises with accessible bin stores. Arson against commercial premises accounts for a significant proportion of serious office fires, and security measures — including controlled access, CCTV, and secure storage of waste — form part of a comprehensive fire safety strategy.

6. Human Error and Inattention

Across all categories, human behaviour remains the most significant variable. Unattended equipment, ignored alarm signals, propped-open fire doors, blocked escape routes, and failure to follow safe working procedures all contribute to preventable fires and, critically, to preventable deaths.

This is precisely why training and a strong fire safety culture are as important as any physical measure.

The Fire Risk Assessment: The Foundation of Office Fire Safety

A fire risk assessment is not a form-filling exercise. It is a structured, thorough evaluation of your office premises — the hazards present, the people at risk, and the measures needed to protect them.

For an office environment, a competent assessor will examine:

Ignition sources — electrical equipment, kitchen areas, heating, hot works, and any other potential sources of ignition within or adjacent to the premises.

Fuel sources — paper, cardboard, furniture, soft furnishings, wall and ceiling linings, and any stored combustible materials.

Means of escape — the number, location, width, and condition of escape routes and final exits; whether they are clearly signed, adequately lit, and free from obstruction at all times; and whether they are sufficient for the number of people likely to be using them.

Fire detection and warning systems — whether the system is appropriate for the size and layout of the premises, regularly tested, and capable of alerting all occupants in the event of a fire.

Emergency lighting — whether escape routes and exit signs remain illuminated if the main power supply fails.

Fire doors — whether fire doors throughout the premises are correctly rated, fitted with self-closing devices and intumescent seals, in good condition, and not being held open or propped.

Firefighting equipment — whether appropriate fire extinguishers are correctly sited, maintained, and understood by relevant staff.

People at risk — including staff with disabilities or mobility impairments, lone workers, visitors, contractors, and anyone else who may be present on the premises.

Management systems — whether the responsible person has adequate procedures in place for maintaining fire safety, including records of testing, maintenance, training, and drills.

The assessment must be reviewed regularly — at least annually — and whenever there is a significant change to the premises, its use, or its occupancy. Refurbishments, changes to office layout, new tenants, and significant increases or decreases in staff numbers all constitute material changes that should trigger a review.

Evacuation Planning: Getting It Right Before It Matters

An evacuation plan is only effective if everyone knows what it says and has practised following it. For offices, this means:

A clearly documented fire emergency plan that sets out what to do on discovering a fire, how to raise the alarm, designated escape routes and assembly points, the roles of fire marshals, and how to account for all persons on the premises.

Appointed and trained fire marshals (also known as fire wardens) — individuals who understand their responsibilities, have received formal training, and are capable of conducting a safe and orderly evacuation including sweep searches of their designated areas.

Personal Emergency Evacuation Plans (PEEPs) for any member of staff, regular visitor, or contractor with a disability or mobility impairment that would prevent them from evacuating independently via the standard escape routes.

Regular fire drills — at least annually for most offices, and more frequently where staff turnover is high or the premises are complex. Drills must be taken seriously, properly recorded, and followed up with a debrief identifying any issues.

Clear assembly points that are far enough from the building to avoid obstruction of the fire and rescue service, and where a headcount can be conducted efficiently.

A common failing in office evacuation planning is the assumption that staff who have worked in a building for years will automatically know what to do. They will not — not unless they have been trained, reminded regularly, and given the opportunity to practise.

The Impact of Hybrid Working on Office Fire Safety

The widespread adoption of hybrid working since the pandemic has introduced a set of fire safety challenges that many offices have not yet fully addressed.

Variable occupancy levels mean that the number of people in the office on any given day may fluctuate significantly. Evacuation plans and fire marshal arrangements that were designed for a fully occupied office may be inadequate — or, on quieter days, may mean that designated fire marshals are not present. Fire safety arrangements must be dynamic enough to account for this variability.

Increased use of personal devices and charging equipment brought in by staff working flexibly — laptops, tablets, portable batteries, and personal phone chargers — adds to the electrical load on office systems and introduces equipment that has not been PAT tested or assessed by the employer.

Hot-desking and flexible workspaces can make it harder to account for all persons during an evacuation, particularly where there is no fixed desk allocation and visitor or contractor attendance is variable.

Reduced occupancy on certain days can create a false sense of security, with maintenance tasks, fire door checks, and housekeeping deferred because "the office is quiet." Reduced occupancy does not reduce fire risk — and in some respects, a quieter office where a fire could go undetected for longer presents a more serious risk, not a lesser one.

Responsible persons should review their fire risk assessments and evacuation plans specifically in light of their current working patterns, not simply rely on arrangements that were put in place before hybrid working became the norm.

Multi-Tenancy Offices and Managed Workspaces

A growing number of businesses occupy offices within multi-tenancy buildings, managed workspaces, serviced offices, or co-working environments. This creates specific fire safety considerations that both tenants and building managers need to understand.

The Responsible Person for common parts, shared escape routes, and building-wide fire safety systems is typically the landlord or managing agent. However, each tenant remains responsible for fire safety within their own demised area — including their own electrical equipment, their own staff training, and their own contribution to keeping shared escape routes clear.

In practice, this means that a tenant in a serviced office cannot simply assume that fire safety is "handled by the building." They have their own legal duties and their own potential liability.

Tenants should request a copy of the building's fire risk assessment, understand the building's evacuation procedures, ensure their own staff are trained accordingly, and raise any concerns about shared areas or systems with the building manager promptly and in writing.

A Practical Compliance Checklist for Office Responsible Persons

If you are responsible for fire safety in an office environment, the following checklist provides a useful starting point:

? A current, written fire risk assessment carried out or reviewed by a competent person

? All significant findings actioned and documented

? Fire alarm system tested weekly (manual call point activation) and formally serviced at least every six months

? Emergency lighting tested monthly and formally serviced annually

? Fire extinguishers inspected annually by a competent engineer

? Fire doors checked regularly — self-closing, no gaps, intumescent seals intact, not propped open

? Escape routes clear, signed, and unobstructed at all times

? Electrical installation subject to regular EICR

? Portable appliances subject to PAT testing

? All staff trained in fire safety procedures on induction and at regular intervals

? Fire marshals appointed, trained, and present whenever the office is occupied

? PEEPs in place for any staff or regular visitors with relevant needs

? Fire drills conducted at least annually and properly recorded

? Fire risk assessment reviewed at least annually and after any significant change

? Records of all of the above maintained and available for inspection

Conclusion: Office Fire Safety Is Not Optional

The relative calm of a well-run office can create a misleading sense of safety. But the legal duties are clear, the risks are real, and the consequences of a failure — whether measured in human cost, financial penalty, or reputational damage — are severe.

A thorough, up-to-date fire risk assessment is the cornerstone of everything. From it flows the training, the procedures, the maintenance regime, and the culture that keeps people safe.

The businesses that manage office fire safety well are not those that react to incidents or enforcement notices. They are the ones that take a proactive, professional approach — understanding that the cost of compliance is always a fraction of the cost of getting it wrong.

For a professional fire risk assessment of your office premises, or for advice on any aspect of fire safety compliance, contact Whale Fire today on 0800 772 0738 or email info@whalefire.co.uk. We work with businesses of all sizes across the UK to ensure they are compliant, prepared, and protected.